More than 100 elected leaders from throughout California this week announced their opposition to Proposition 21, the extreme rent control measure going before California voters in the Nov. 3 statewide election.

The list of officials opposing radical rent control measure includes county supervisors, mayors, city council members, city clerks and board members.

According to the Legislative Analyst’s Office, Prop 21 could result in a decline in property values which in turn would result in the potential loss of tax revenue. Prop 21 also could result in “tens of millions of dollars per year” in increased costs to local government. Like its predecessor Prop 10, Prop 21 aims to dismantle the Costa-Hawkins Rental Housing Act — the single most vital California law for rental housing providers.

If Proposition 21 passes, local governments will bring back vacancy controls, capping rents between tenancies; they’ll also apply local rent control ordinances to newer apartments — as soon as they turn 15 years old — and to a greater number of condos and single-family homes.

“Proposition 21 will make California’s housing crisis even worse,” notes Tom Bannon, chief executive officer of the California Apartment Association and Californians for Responsible Housing, the campaign opposing the ballot measure. “No one knows that more than our local leaders who know it will lead to cuts and services and millions of new costs at a time when our communities can least afford it.”

In addition to the local officials listed below, Proposition 21 is opposed by Gov. Gavin Newsom. Major senior, veterans, affordable housing, and labor groups also have announced their opposition, along with nearly all of the state’s newspaper editorial boards.